The guy is a debt collector for a financial company in Japan, he went to a debtor's house nearby to collect monthly interest and heard that it was a beautiful female customer, came many times but did not meet anyone in the house and saw that the door was not locked, so he went into the house to meet her. When he walked near the toilet door, he heard the sound of water mixed with lewd moans coming out, he was curious to get closer and the ending was really happy
